In sales order tax is rounding off the value

hello Team,

I got one issue where my vat tax 12.5% is calculating on net value,but it is rounding of the percntage

i.e basic price is 10 rupees

minus(-) discount=14% 1.40

net value= 8.60

Tax 12.5% on net value is= 1.075

Total value = 9.675

but in my sales order its rounding off the tax percentage as 1.8 and total value as 9.68 i want the exact value has to be calculated,because this is effecting in invoice output. so please guide me